Although TongHer's price has increased 75% since 6 months ago as shown below:-

However, it seems that the earning has been doubled:-

From what I've found, there seems to have more upside moving forward:-

1.  2017/6/12: after Q1FY17 results: TP = RM 4.08 (21% upside) by Wealth Farmer (http://klse-wealth-farmer.blogspot.my/2017/06/tongher-story.html) due to acquisition of Thailand subsidiary.

2.  2017/5/22: after Q1FY17 results: TP = RM 4.25 (26% upside) by RHB Research Institude (http://www.theedgemarkets.com/article/progressive-revenue-increase-seen-tong-herr-fy17-fy19) due to disposition of loss-making associate and acquisition of Thailand subsidiary.

Given the EPS is more than doubled now as compare to a year ago, it seems that the target price of doubling is reasonable as well.